Fax
Service. Helps you send & receive faxes. This Service
is added if you have installed a Fax capable Modem in machine. If you
have no intention of using the Modems Fax capabilities however, you
should set this to Manual. If you intend to use the Modems Fax
capabilities a lot then set this to Automatic.

FTP
Publishing Service. Provides FTP connectivity &
administration through the Internet Information Services snap-in.
If you have IIS 5.0 installed, & is configured to provide an FTP
on your machine set this to Automatic, otherwise leave it set
to Manual.

IIS
Admin Service. Allows administration of Web & FTP services
through the Internet Information Services snap-in. If you have
IIS 5.0 installed & configured to provide an FTP/Website on your
machine set this to Manual to allow you to configure it
whenever needed.

Indexing
Service. Indexes contents & properties of files on local &
remote computers; provides rapid access to files through flexible
querying language. This Service is added if you the Indexing
Service installed (It is installed by default). The Indexing
service is similar to FindFast in Microsoft Office,
although is generally regarded as more useful. Most of you should be
fine leaving this set to Manual. Although if you wish to
maintain regular index updates set this to Automatic.

Internet
Connection Sharing. Provides network address translation,
addressing, & name resolution services for all computers on your
home network through a dial-up connection. If you are sharing an
Internet connection on your network then set this to Automatic.
If no Internet connection is being shared you can set this to Manual
instead.

IPSEC
Policy Agent. Manages IP security policy & starts the
ISAKMP/Oakley (IKE) & the IP security driver. If you aren't
connected to a Windows 2000 Domain you may set this to Manual.
If you are connected to a Windows 2000 Domain set this to Automatic.

Logical
Disk Manager Administrative Service. Administrative service
for disk management requests. This Service may be set to Manual.

Messenger.
Sends & receives messages transmitted by administrators or by
the Alerter service. If you are connected to a Windows 2000
Domain/Network set this to Automatic. If you aren't connected
to a network you may set this to Manual.

Net
Logon. Supports pass-through authentication of account logon
events for computers in a domain. If you are connected to a
Windows 2000 Domain then set this to Automatic. If you aren't
connected to a Windows 2000 Domain you may set it to Manual.

NetMeeting
Remote Desktop Sharing. Allows authorized people to remotely
access your Windows desktop using NetMeeting. For security
reasons I'd recommend you set this to Disable unless you
really need to give others remote access to your Desktop via
NetMeeting, in which case set this Service to Manual.

Network
Connections. Manages objects in the Network & Dial-Up
Connections folder, in which you can view both local area network &
remote connections. Leave this set to Automatic unless
your system is not connected to a Network/Internet, in which case you
may set this to Manual.

Network
DDE. Provides network transport & security for Dynamic
Data Exchange. Set this to Automatic if you use DDE
connections (More than likely you won't need this unless using
certain legacy applications). DDE is a type of IPC
(InterProcess Communication). If you need this
you generally should know that. Otherwise, set this to Manual.
Supports network transport of DDE (Dynamic Data Exchange)
connections.

Network
DDE DSDM. Manages shared dynamic data exchange & is used
by Network DDE. Set this to Automatic if you have set the
Network DDE Service to Automatic. Otherwise, set it to
Manual.

NT
LM Security Support Provider. Provides security to Remote
Procedure Call programs that use transports other than named pipes.
For improved security with RPC Applications you should set this to
Automatic. If you don't use many of these you may save some
Memory by setting this to Manual.

Performance
Logs & Alerts. Configures performance logs & alerts.
If you have your system configured to track events/system
performance, etc. upon system startup set this to Automatic.
If your system isn't configured like this leave it set to Manual.

Print
Spooler. Loads files to memory for later printing. If you
don't have a Printer installed (Network, or local) you can set
this to Manual. If you have a printer installed, or intend
to install a printer then set this to Automatic. You can read
more in this MS
Knowledge Base
article.

Protected
Storage. Provides protected storage for sensitive data, such
as private keys, to prevent access by unauthorized services,
processes, or users. If your system contains such sensitive data
then you should set this to Automatic (to keep it protected at
all time). When set to Manual you may find this causes
problems with certain programs, e.g. Outlook Express, if so then set
it back to Automatic.